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  • Title: Observation of magnetic excitations of Skyrmion crystal in a helimagnetic insulator Cu2OSeO3.
    Author: Onose Y, Okamura Y, Seki S, Ishiwata S, Tokura Y.
    Journal: Phys Rev Lett; 2012 Jul 20; 109(3):037603. PubMed ID: 22861898.
    Abstract:
    We have investigated the low-energy dynamics of the triangular lattice of Skyrmions in a helimagnetic insulator Cu2OSeO3 in terms of microwave response. We have observed two elementary excitations of the Skyrmion with different polarization characteristics: the counterclockwise circulating mode at 1 GHz with the magnetic field polarization parallel to the Skyrmion plane and the breathing mode at 1.5 GHz with a perpendicular magnetic field polarization. These modes reflect the topological nature of Skyrmions and may play a central role in the Skyrmion dynamics.
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